B-2 MAINTENANCE FUNCTIONS. - continued
Remove/Install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (component
or assembly) m a manner to allow the proper functioning of an equipment or system.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is
authorized by the MAC and assigned maintenance level is shown as the 3 rd position code of the SMR code.
Repair. The application of maintenance services1, including fault location/troubleshooting2, removal/installation,
and disassembly/assembly3 procedures, and maintenance actions4 to identify troubles and restore serviceability to an
item by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or
assembly), end item, or system.
Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely serviceable/
operational condition as required by maintenance standards in appropriate technical publications (i.e., DMWR).
Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally return an
item to like new condition.
Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a like
new condition m accordance with original manufacturing standards. Rebuild is the highest degree of material
maintenance applied to Army equipment The rebuild operation includes the act of returning to zero those age
measurements (e.g., hours/miles) considered in classifying Army equipment/components.
B.3 EXPLANATIONOF COLUMNS IN THE MAC, SECTION II
Column 1. Group Number. Column 1 lists functional group code numbers, the purpose of which is to Identify
maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.
Column 2. Component/Assembly. Column 2 contains the names of components, assemblies, subassemblies,
and modules for which maintenance is authorized.
Column 3. Maintenance Functions. Column 3 lists the functions to be performed on the item listed in column 2.
(For detailed explanation of these functions, see paragraph B-2.)
1Services Inspect, test, service, adjust, align, calibrate, and/or replace.
2Fault location/troubleshooting The process of investigating and detecting the cause of equipment
malfunctioning; the act of isolating a fault within a system or unit under test (UUnI).
3 Disassembly/assembly The step-by-step breakdown (taking apart) of a spare/functional group coded item to the
level of its least component, that is assigned an SMR code for the level of maintenance under consideration (e.g.,
identified as maintenance significant).
4 Actions Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.